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Effects Of Trilinolein On Superoxide Dismutase Activity And Mrna Levels In Aortic Smooth Muscle Cells
Author(s) -
Chan Paul,
Chang JunJen,
Chen FuChean,
Wu MingShun,
Tomlinson Brian,
Cheng JueiTang
Publication year - 2000
Publication title -
clinical and experimental pharmacology and physiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 103
eISSN - 1440-1681
pISSN - 0305-1870
DOI - 10.1046/j.1440-1681.2000.03385.x
Subject(s) - superoxide dismutase , incubation , radical , reactive oxygen species , chemistry , oxygen , dismutase , incubation period , superoxide , messenger rna , vascular smooth muscle , medicine , pharmacology , endocrinology , biochemistry , oxidative stress , smooth muscle , enzyme , biology , gene , organic chemistry
SUMMARY 1. Atherosclerotic cardiovascular disease is still the leading cause of death in Western countries. Oxygen free radicals are considered to be intimately involved in the development of atherosclerosis. Anti‐oxidants may help to protect mammalian cells from the damage induced by these reactive oxygen species. Many reports have indicated that anti‐oxidants used in the treatment or prevention of disease could modify the levels of superoxide dismutase (SOD). However, the effects of long‐term anti‐oxidant treatment on the levels of SOD in smooth muscle cells (SMC) is still unclear. In the present study, the effects of the lipophilic anti‐oxidant trilinolein on the activity and gene expression of SOD in SMC were evaluated. 2. After 2 days incubation with 0.1 μ mol/L trilinolein, the activity and mRNA levels of SOD were increased in rat aortic SMC (A7r5), but there was no significant change in these parameters with a higher concentration of 1 μ mol/L trilinolein. 3. In contrast, after 7 days incubation with trilinolein, both the activity and mRNA levels of SOD were lowered in a dose‐dependent manner. 4. These data emphasize the importance of choosing an optimal dosage for supplementation with anti‐oxidants in humans for the scavenging of oxygen free radicals.